Abstract
The membered ring microstructures are considered to study the influences of the structure parameters, frontier molecular orbital, and luminescence properties in Ge-doped silica optical fiber material with trivalent cerium. The calculations indicate that Ce3+ ion is more likely to exist outside the membered ring structures than embedded into the membered rings. The results reveal that after the Ce incorporation, a strong absorption peak and an emission peak appear with a combination of Ce3+ ions and GeO2 matrix. Moreover, the energy levels for Ce-doped silica optical fiber are investigated, which explained the influence of different membered rings on the luminescence properties.
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